Question

look at this graph:
graph of a parabola with vertex at (0,0) opening upwards
what is the equation of the axis of symmetry?

Explanation:

Step1: Identify parabola vertex

The vertex of the parabola is at $(0, -1)$.

Step2: Find axis of symmetry

For a vertical parabola, the axis of symmetry is the vertical line passing through the vertex's x-coordinate.

Answer:

$x=0$